The tradition originated with the ancient Celtic festival of Samhain, when people would light bonfires and wear costumes to ward off ghosts.

In the eighth century, Pope Gregory III designated November 1 as a time to honor all saints.

Soon, All Saints Day incorporated some of the traditions of Samhain. The evening before was known as All Hallow Evening, and later Halloween. Visit Now All Hallow Evening for the best costumes for Halloween.